Space Time
Also known as V838 Mon, V838 Mon light echo.
One record per aspect. The origin says what kind of thing each value is; the source says where it came from; the limit says what it cannot tell you.
V838 Monocerotis image-field center is placed at J2000 RA 7.1 h, Dec -3.8° in Monoceros, at an adopted distance of 20,000 light-years.
V838 Monocerotis (light echo; central source V838 Monocerotis, illuminating stellar system): projected footprint at the adopted distance 14.5 × 16.2 light-years; outer radius used for arrival 8.1 light-years.
A single September 2006 observation of a light echo. Its apparent expansion is moving illumination, not a shell of gas expanding at light speed. Projected structure follows the credited observation at its published angular scale and an approximate adopted distance. Shallow depth is illustrative, not measured tomography. The source palette is preserved; brightness is adjusted for the navigable view.